{"id":"CVE-2026-4869","title":"A potential privilege escalation issue was identified in InstallShield version 2025 R2 and earlier when running compressed Basic MSI setup with Prerequisites from an insecure location","summary":"A potential privilege escalation issue was identified in InstallShield version 2025 R2 and earlier when running compressed Basic MSI setup with Prerequisites from an insecure location. If a local administrator launches a compressed Setup…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","cwe":["CWE-426"],"vendor":"Flexera","product":"InstallShield","affected":["InstallShield <= 2025 R2"],"published":"2026-10-13","updated":"2026-10-16","sourceUpdated":"2026-10-16T16:00:33.533","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-4869","references":[{"url":"https://community.revenera.com/s/article/CVE-2026-4869-Potential-Privilege-Escalation-in-InstallShield-2025-R2-running-Setup-Prerequisites-from-an-insecure-directory","label":"PSIRT-CNA@flexerasoftware.com"}],"tags":["nvd","cve.org"],"epss":0.00112,"epssPercentile":0.01386,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-13T14:52:25.727869Z"},"cvssSource":"cna","ingestedAt":"2026-10-13T15:33:40.077Z","slug":"CVE-2026-4869","body":"## Overview\n\nA potential privilege escalation issue was identified in InstallShield version 2025 R2 and earlier when running compressed Basic MSI setup with Prerequisites from an insecure location. If a local administrator launches a compressed Setup.exe with Prerequisites from an unsecured location, the Prerequisite installers also might load from an unsecured location, potentially leading to privilege escalation.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":220957,"id":"CVE-2026-4869","ts":1792026941074,"field":"cvss","old":null,"new":"5.4"},{"seq":220956,"id":"CVE-2026-4869","ts":1792026941074,"field":"severity","old":"none","new":"medium"}]}